Shit Steve, you get the motor, I'll help you put it in. For that matter, you can use my shop.
Not entirely positive, but the AWD (all wheel drive, NOT four wheel drive - big difference) shouldn't be a problem, so long as you get the driveline, differential and axles from the back.
Being that yours is a 93 and the Alltrac was a 97 - you might be fucked out of AWD. I'm not a Celica expert, but I can learn it if you need.